Making dependency list for source file swakExplicitSources.C
could not open file FixedValuePointPatchField.H for source file swakExplicitSources.C
could not open file ZeroGradientPointPatchField.H for source file swakExplicitSources.C
could not open file CalculatedPointPatchField.H for source file swakExplicitSources.C

why it cant open these and many other headers?whats the problem?is compilation ok despite of these messages?

(The message board needs to have at least 10 characters so I'll add an aside: I don't want to imagine the amount of questions you'll ask once you start with Python)

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Making dependency list for source file swakExplicitSources.C
could not open file FixedValuePointPatchField.H for source file swakExplicitSources.C
could not open file ZeroGradientPointPatchField.H for source file swakExplicitSources.C
could not open file CalculatedPointPatchField.H for source file swakExplicitSources.C

why it cant open these and many other headers?whats the problem?is compilation ok despite of these messages?

I said it elsewhere: the warnings are ONLY warnings (in computer generated code. So there is not much that can be done about it)

"Could not open file" is an artefact of the utility that determines the dependenies of the source files. It is completely irrelevant

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Note: I don't use "Friend"-feature on this forum out of principle. Ah. And by the way: I'm not on Facebook either. So don't be offended if I don't accept your invitation/friend request